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(No Model.) 2 SheetsSheet 1. L. WEIGERT.

INHALER FOR WARM MB.

No. 398,991, Patented Mar. 5, 1889.

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L. WEIGERT.

I INHALERPOR WARM AIR. No. 398391. Patented Mar. 5, 1889.

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'INHALER Foe WARM AIR.

SPECIFICATION forming part of Letters Patent No. 398,991, dated March 5, 1889.

Application filed December '7, 1888.

To (Ll Z whom it may concern.-

Be it known that I, Dr. Med. 'Loo'rs WEI- GERT, of Berlin, in the Kingdom of Prussia, and German Empire, have invented a new and useful Improved Means for \Yarming Air to be Inhaled by Persons Sufliering from Throat or Lung Complain ts, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to apparatus for supplying heatcd air of a suitable temperature for inhalation by persons suffering-from diseases of the throat and lungs.

The way in which I prefer to carry out the present invention is represented in the accompanying drawings, whereof Figure 1 shows in side elevation the improved apparatus, Fig. 2 being a vertical section thereof to an enlarged scale.

The apparatus d and the burner e, or other source of heat, are respectively arranged to slide upon a rod, a, to which they may be clamped in the desired positions by means of the screws 1) and The apparatus 61 consists of an inner hollow cylinder, f, preferably made of sheet copper and open at the bottom, the top thereof being provided with a thin curved or arched lid or cover, g, furnished with two openings, h 72, in which are mounted two funnel-shaped tubes or fines, c' i. The hollow cylinder f is provided with a flange, 7a, and stands upon an annular support, Z, movement in a vertical direction being prevented by means of flat spring-blades m, hereinafter more particularly referred to. IVithin the flange 7a of the hollow cylinder f is secured a second hollow cylinder, n, which, forms a hood, open at the bottom and closed at the top by the lid or cover p. The hollow cylinder n is furnished toward the bottom with a number of openings, 0, through which air is permitted to flow into the apparatus. The lid or cover p of the hood a has three openings, q q and 9, through two of which (the openings q q) are passed the funnelshaped tubes or fines 2 2', a funnel, .9, being firmly mounted in the opening 9. The hood 'n is surrounded by a casing, 16, of non-conducting materialsuch as asbestus pulpwhich serves to intercept the radiation of heat from the hood n, uniformity of temperature Serial No. 292,907. (No model.

of the air within the space a, formed between the hollow cylinder 7" and the hood '21, being hereby better maintained. The spring-blades in press against the outer periphery of the casing t, and the hood n being fixed within the flange 7;, the whole apparatus is firmly held upon the support Z. In the funnel s is mounted an elbow-pipe,2:,which conducts the air heated in the space a to the mouth-piece w prior to inhalation by the patient. In the tube 51?, which projects from the elbow-pipe t, a thermometer, y, is fitted hermetically, and serves to indicate the temperature of the heated air. In order to prevent'the patient, after inhaling warm air from the space u, breathing into the latter and thus vitiating the air therein, the elbow-pipe r is furnished with suction and delivery valves. The conical valve 2, which rests against the seat w, opens outwardly, and closes upon air being exhaled by the patient. The valve ,2, which rests against the seat r in the part v closes when inhalation of the heated air takes place and opens when air is exhaled. Thus, when the air is being inhaled through the mouthpiece it, the valve z is open and the valve .2" closed, and when air is being exhaled through the said mouth-piece, the valve 2 is closed and the valve 2' open. To increase the sensibility of the valves :2 and 2, they are made of very light materialsuch, for example, as aluminiumthe valve 2 being placed in the horizontal branch of the elbow-pipe v, while the valve .2 is arranged vertically, so as to open automatically when the inhalation of Warm air ceases. The pins 2 are employed to limit the movements of the valves .2- and .2".

IVhen the apparatus is in use, the hollow cylinder f is heated by means of the burner e or equivalent heating device, the products of combustion escaping through the pipes 'i t. The air drawn through the openings 0 into the space it becomes heated while flowing along the periphery of the hot cylinder f, and after passing through the pipe 7; and the valve z is inhaled by the patient through the m outlipiece to.

\Vhat I claim, and desire to secure by Let ters Patent of the United States, is

An apparatus for producing warm air for inhalation, comprising a chamber, heated by a burner, e, or equivalent heating device, duit furnished with valves 5 z for inhalation Io fitted with outlets i i for the escape of the and exhalation, respectively, substantially as products of combustion and surrounded by a described. casing, n, the space 'u,inte1"'ening between the In witness whereof I have hereunto set my 5 chamber and the casing, serving as a passage hand in presence of two witnesses.

for air which enters through openings below, LOUIS VVEIGERT. becomes heated through contact with the cen- \Vitnesses: tral chamber, f, and ultimately escapes from XVILHELM BINDEWALD,

the upper part of the space It by way of a con- ADOLPH HETOZER. 

